Population and Interactions Review

4

Categorize as abiotic or biotic

Rain
Wind
Soil
Bunny
Tree
Deer
Dragonfly (bug)
Sunlight

Abiotic
Biotic

3

Match the definition and symbol to the correct symbiotic term

+/-
+/+
Both organisms benefit
One organism benefits while the other is neither helped nor harmed
One organism harms another
+/0

Mutualism
Parasitism
Commensalism

1

Cheetah killing a zebra is an example of

Predator/Prey relationship

Commensalism

Mutualism

Competition

1

What is death rate?

the number of organisms that enter a population from another area

the number of organisms that die in a year

the number of organisms that leave a population

the number of organisms that are born during a year

1

What is the emigration rate?

the number of organisms that are born during a year

the number of organisms that enter a population from another area

the number of organisms that leave a population

the number of organisms that die in a year

1

What is the immigration rate?

the number of organisms that leave a population

the number of organisms that enter a population from another area

the number of organisms that die in a year

the number of organisms that are born during a year

1

What is the birth rate?

the number of organisms that leave a population

the number of organisms that are born during a year

the number of organisms that die in a year

the number of organisms that enter a population from another area

1

Birth rate causes the population to

decrease

stay the same

increase

1

A population of beetles was about 2,000 in the year 2002. In 2004, the size of the population was 5,000. Which statement explains the change?

The birth rate was greater than the death rate

The emigration rate was greater then the birth rate

The death rate was greater than immigration rate

1

When a population is at carrying capacity. The death rate is ….

zero

half the birth rate

equal to the birth rate

greater than the birth rate

1

Between month 1 and 4, is the population

increasing

decreasing

remaining the same

1

Compare the birth rate to death rate from month 1 to 5

the birth and death rate are equal

the birth rate is greater than the death rate

the birth rate is less than the death rate

1

Scientists have identified the elephant as a keystone species in the African savanna ecosystem. One reason is that the elephant digs holes to access groundwater that other organisms use as well. If the elephant population declined, what do you predict would happen to the ecosystem over time?

The populations of animals that rely on water from elephants would increase.

The populations of animals that rely on water from elephants would decrease

The populations of animals that rely on water from elephants would remain the same

1

Population and Interactions Review

Categorize as abiotic or biotic

Match the definition and symbol to the correct symbiotic term

Cheetah killing a zebra is an example of

What is death rate?

What is the emigration rate?

What is the immigration rate?

What is the birth rate?

Birth rate causes the population to

A population of beetles was about 2,000 in the year 2002. In 2004, the size of the population was 5,000. Which statement explains the change?

When a population is at carrying capacity. The death rate is ….

Between month 1 and 4, is the population

Compare the birth rate to death rate from month 1 to 5

Scientists have identified the elephant as a keystone species in the African savanna ecosystem. One reason is that the elephant digs holes to access groundwater that other organisms use as well. If the elephant population declined, what do you predict would happen to the ecosystem over time?

Categorize as abiotic or biotic

Match the definition and symbol to the correct symbiotic term

Cheetah killing a zebra is an example of

What is death rate?

What is the emigration rate?

What is the immigration rate?

What is the birth rate?

Birth rate causes the population to

A population of beetles was about 2,000 in the year 2002. In 2004, the size of the population was 5,000. Which statement explains the change?

When a population is at carrying capacity. The death rate is ….

Between month 1 and 4, is the population

Compare the birth rate to death rate from month 1 to 5

Scientists have identified the elephant as a keystone species in the African savanna ecosystem. One reason is that the elephant digs holes to access groundwater that other organisms use as well. If the elephant population declined, what do you predict would happen to the ecosystem over time?

As part of the ivory trade, the African elephant was killed for its tusks. The population of African elephants decreased from 26 million in the 1800s to just 415,000 today. What component would you need to add to the model to represent the interaction that caused the elephant population to change?

As part of the ivory trade, the African elephant was killed for its tusks. The population of African elephants decreased from 26 million in the 1800s to just 415,000 today. What component would you need to add to the model to represent the interaction that caused the elephant population to change?